costarred or co-starred; costarring or co-starring. Definition of costar (Entry 2 of 2) 1 transitive : to employ or present (someone) as one of two or more leading performers in a motion picture, play, etc.

What does co-star mean in acting?

or co-star

a performer, especially an actor or actress, who shares star billing with another.

What do you mean by co-stars?

Definition of 'co-star'

An actor's co-stars are the other actors who also have one of the main parts in a particular film. He now lives in Berlin with his co-star from the film. 2. verb. If an actor co-stars with another actor, the two of them have the main parts in a particular film.